AutoCodes – Nissan – P0123 Nissan

P0123 Nissan Code - Throttle Position Sensor/Switch '1' Circuit High Input

Quick Answer

The Throttle Position Sensor (TPS) responds to the accelerator pedal movement. Common causes include Faulty throttle position sensor, Throttle position sensor harness is open or shorted, Throttle position sensor circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: P0123 Nissan indicates Throttle Position Sensor/Switch '1' Circuit High Input.
Common causes: Common causes include Faulty throttle position sensor, Throttle position sensor harness is open or shorted, Throttle position sensor circuit poor electrical connection.
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

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Code Popularity 61,460

How popular is this code, among other codes? Medium

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jun 14, 2020

Description
Step-by-Step Diagnostic Guide
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0123 Nissan Description

The Throttle Position Sensor (TPS) responds to the accelerator pedal movement. This sensor is a kind of potentiometer which transforms the throttle position into output voltage, and emits the voltage signal to the Engine Control Module (ECM). In addition, the sensor detects the opening and closing speed of the throttle valve and feeds the voltage signal to the ECM.
Idle position of the throttle valve is determined by the ECM receiving the signal from the throttle position sensor. This sensor controls engine operation such as fuel cut. On the other hand, the Wide open and closed throttle position switch, which is built into the throttle position sensor unit, is not used for engine control.

OBDII Code P0123 Nissan - Throttle Position Sensor/Switch '1' Circuit High Input - AutoCodes.com — P0123 Nissan Code - Throttle Position Sensor/Switch '1' Circuit High Input

What does this mean?

What are the Possible Causes of the DTC P0123 Nissan?

Faulty throttle position sensor
Throttle position sensor harness is open or shorted
Throttle position sensor circuit poor electrical connection

How to Fix the DTC P0123 Nissan?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0123 Nissan code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the P0123 Nissan code?

Need more information on how to fix the P0123 Nissan code? Get Access to Factory Service Manuals

Need Help with the Code?

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Information for Specific Nissan Models

P0123 2002 Nissan Altima Sedan — Throttle Position Sensor Circuit High Voltage
P0123 2003 Nissan Altima Sedan — Throttle Position Sensor/Switch '1' Circuit High Input
P0123 2004 Nissan Altima Sedan — Throttle Position Sensor/Switch '1' Circuit High Input
P0123 2005 Nissan Altima Sedan — Throttle Position Sensor/Switch '1' Circuit High Input
P0123 2006 Nissan Altima Sedan — Throttle Position Sensor/Switch '1' Circuit High Input
P0123 2008 Nissan Altima Sedan — Throttle Position Sensor/Switch '1' Circuit High Input
P0123 2009 Nissan Altima Sedan — Throttle Position Sensor/Switch '1' Circuit High Input
P0123 2010 Nissan Altima Sedan — Throttle Position Sensor/Switch '1' Circuit High Input
P0123 2011 Nissan Altima Sedan — Throttle Position Sensor/Switch '1' Circuit High Input
P0123 2012 Nissan Altima Sedan — Throttle Position Sensor/Switch '1' Circuit High Input
P0123 2004 Nissan Maxima — Throttle Position Sensor/Switch '1' Circuit High Input
P0123 2005 Nissan Maxima — Throttle Position Sensor/Switch '1' Circuit High Input
P0123 2006 Nissan Maxima — Throttle Position Sensor/Switch '1' Circuit High Input
P0123 2007 Nissan Maxima — Throttle Position Sensor/Switch '1' Circuit High Input
P0123 2008 Nissan Maxima — Throttle Position Sensor/Switch '1' Circuit High Input
P0123 2005 Nissan Pathfinder — Throttle Position Sensor/Switch '1' Circuit High Input
P0123 2006 Nissan Pathfinder — Throttle Position Sensor/Switch '1' Circuit High Input
P0123 2007 Nissan Pathfinder — Throttle Position Sensor/Switch '1' Circuit High Input
P0123 2008 Nissan Pathfinder — Throttle Position Sensor/Switch '1' Circuit High Input
P0123 2009 Nissan Pathfinder — Throttle Position Sensor/Switch '1' Circuit High Input
P0123 2010 Nissan Pathfinder — Throttle Position Sensor/Switch '1' Circuit High Input
P0123 2011 Nissan Pathfinder — Throttle Position Sensor/Switch '1' Circuit High Input
P0123 2012 Nissan Pathfinder — Throttle Position Sensor/Switch '1' Circuit High Input
P0123 2008 Nissan Rogue — Throttle Position Sensor/Switch '1' Circuit High Input
P0123 2009 Nissan Rogue — Throttle Position Sensor/Switch '1' Circuit High Input
P0123 2010 Nissan Rogue — Throttle Position Sensor/Switch '1' Circuit High Input
P0123 2011 Nissan Rogue — Throttle Position Sensor/Switch '1' Circuit High Input
P0123 2012 Nissan Rogue — Throttle Position Sensor/Switch '1' Circuit High Input
P0123 2013 Nissan Rogue — Throttle Position Sensor/Switch '1' Circuit High Input
P0123 2002 Nissan Sentra — Throttle Position Sensor/Switch '1' Circuit High Input
P0123 2003 Nissan Sentra — Throttle Position Sensor/Switch '1' Circuit High Input
P0123 2004 Nissan Sentra — Throttle Position Sensor/Switch '1' Circuit High Input
P0123 2005 Nissan Sentra — Throttle Position Sensor/Switch '1' Circuit High Input
P0123 2006 Nissan Sentra — Throttle Position Sensor/Switch '1' Circuit High Input
P0123 2007 Nissan Sentra — Throttle Position Sensor/Switch '1' Circuit High Input
P0123 2008 Nissan Sentra — Throttle Position Sensor/Switch '1' Circuit High Input
P0123 2009 Nissan Sentra — Throttle Position Sensor/Switch '1' Circuit High Input
P0123 2010 Nissan Sentra — Throttle Position Sensor/Switch '1' Circuit High Input
P0123 2011 Nissan Sentra — Throttle Position Sensor/Switch '1' Circuit High Input
P0123 2012 Nissan Sentra — Throttle Position Sensor/Switch '1' Circuit High Input
P0123 2007 Nissan Versa — Throttle Position Sensor/Switch '1' Circuit High Input
P0123 2008 Nissan Versa — Throttle Position Sensor/Switch '1' Circuit High Input
P0123 2009 Nissan Versa — Throttle Position Sensor/Switch '1' Circuit High Input
P0123 2010 Nissan Versa — Throttle Position Sensor/Switch '1' Circuit High Input
P0123 2011 Nissan Versa — Throttle Position Sensor/Switch '1' Circuit High Input
P0123 2012 Nissan Versa — Throttle Position Sensor/Switch '1' Circuit High Input

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P0123 Nissan Code

1. What are the common symptoms of OBDII code P0123 in a Nissan related to the Throttle Position Sensor/Switch '1' Circuit High Input?

- Common symptoms include issues with acceleration, stalling, poor fuel economy, and the vehicle going into "limp mode."

2. What are the possible causes of OBDII code P0123 in a Nissan?

- The most common causes include a faulty throttle position sensor, damaged wiring or connectors in the sensor circuit, or issues with the engine control module (ECM).

3. How can I diagnose the Throttle Position Sensor/Switch '1' Circuit High Input issue in my Nissan?

- You can use an OBDII scanner to read the trouble code and analyze the sensor's voltage output. Additionally, inspect the sensor's wiring and connectors for any signs of damage.

4. Can I continue driving my Nissan with OBDII code P0123 present?

- It is not recommended to continue driving with this code, as it can lead to further engine performance issues and potential safety hazards.

5. How can I repair OBDII code P0123 in my Nissan?

- The repair typically involves replacing the throttle position sensor, repairing any damaged wiring or connectors, and clearing the trouble code with an OBDII scanner.

6. Are there any DIY tips for fixing the Throttle Position Sensor/Switch '1' Circuit High Input issue in my Nissan?

- While some basic troubleshooting can be done, it is recommended to have a qualified mechanic diagnose and repair this issue to ensure proper functionality.

7. Will resetting the OBDII code P0123 in my Nissan make the issue go away permanently?

- Resetting the code may temporarily clear the warning light, but if the underlying issue is not addressed, the code is likely to reappear.

8. How long does it take to replace the throttle position sensor in a Nissan affected by OBDII code P0123?

- The replacement process usually takes around 1-2 hours, but it can vary depending on the model and accessibility of the sensor.

9. Can a dirty throttle body cause OBDII code P0123 in a Nissan?

- While a dirty throttle body can cause related issues, OBDII code P0123 specifically indicates a high input in the throttle position sensor circuit.

10. Is it necessary to recalibrate the throttle position sensor after replacing it to resolve OBDII code P0123 in a Nissan?

- In most cases, recalibration is not required after replacing the throttle position sensor. However, it is recommended to follow manufacturer guidelines for sensor replacement procedures.